There is no official announcement on 5.1.2. It's only speculation. If Apple were smart they would patch the known exploits in the backup / restore code and release it ASAP, but since they released 5.1.1 without patching it (and they knew about it for a long time), this seems unlikely.
Best thing to do is stay alert. Monitor the news and our site of course. If there is official word, then we will post accordingly.
You normally get at least 24 hours before Apple can stop signing the old version of IOS, so if you hear 5.1.2 has been released, that is the time to check the facts and get updated to 5.1.1. The 5.1.1 jailbreak is likely to be out any day now, although there are no guarantees. The decision on what to do is yours